91399101 has 8 divisors (see below), whose sum is σ = 128279520. Its totient is φ = 57725712.

The previous prime is 91399073. The next prime is 91399103. The reversal of 91399101 is 10199319.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91399101 - 2⁵ = 91399069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91399103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 801690 + ... + 801803.

It is an arithmetic number, because the mean of its divisors is an integer number (16034940).

Almost surely, 2^91399101 is an apocalyptic number.

It is an amenable number.

91399101 is a deficient number, since it is larger than the sum of its proper divisors (36880419).

91399101 is a wasteful number, since it uses less digits than its factorization.

91399101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603515.

The product of its (nonzero) digits is 2187, while the sum is 33.

The square root of 91399101 is about 9560.2877048758. The cubic root of 91399101 is about 450.4507434229.

The spelling of 91399101 in words is "ninety-one million, three hundred ninety-nine thousand, one hundred one".